Able seaman Rogg was a male Starfleet operations division crewman who served in 2293. (Star Trek VI: The Undiscovered Country)
Rogg's name comes from the name tag that was included along with two Starfleet uniform and accessory lots sold on It's A Wrap! sale and auction. [1]
He was played by one of several unknown actors who served aboard either the USS Enterprise-A or USS Excelsior.